CN100498061C - High power gas catalytic burner - Google Patents
High power gas catalytic burner Download PDFInfo
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- CN100498061C CN100498061C CNB2007102006958A CN200710200695A CN100498061C CN 100498061 C CN100498061 C CN 100498061C CN B2007102006958 A CNB2007102006958 A CN B2007102006958A CN 200710200695 A CN200710200695 A CN 200710200695A CN 100498061 C CN100498061 C CN 100498061C
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- burner
- gas
- catalytic burner
- combustion
- high power
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Abstract
A catalytic burner of large-power fuel gas type is prepared for connecting gas inlet end of gas transmission pipe to one end of T-joint on pipe, connecting the other two ends in form of 90 degree elbow of T-joint to mixed gas channel, arranging fluid rectifier separately at inlet and outlet of mixed gas channel, connecting one set of catalyst carrier porous module set in frame separately to each of double-surface at burner cavity, packing high-temperature resisting insulation material at peripheral gap of said module and extending temperature transducer into said module through a temperature transducer entrance set on external wall of burner cavity.
Description
(1), technical field
The present invention relates to a kind of is the burner of fuel with the combustion gas, particularly a kind of catalytic burner.
(2), background technology
Catalytic combustion is by catalyst, control the combustion chemistry course of reaction under certain condition and discharge heat, and catalyst itself does not consume.Catalytic combustion can reduce activation energy, quickens necessary chemical reaction, makes harmful or unnecessary chemical reaction be reduced to bottom line.At present natural gas catalytic combustion has been realized efficiency of combustion greater than 99.99%, and nuisance NOx, the CO of fume emission, HC are all less than 10 * 10
-6, very obvious, the efficiency of combustion of catalytic combustion is high, and in burning pollutant is control effectively, so catalytic combustion is very desirable and eco-friendly combustion system.
The greenhouse effects that well-known discharge of methane produces are 21 times of carbon dioxide, are 7 times of carbon dioxide to the destructive power of ozone layer.The characteristics of combustion gas catalytic combustion are fuel-lean combustions, with the methane example, when methane and Air mixing concentration are lower than 5%, can not normal combustion, but can completing combustion by catalyst, therefore catalytic combustion can be used for the poor fuel that gas concentration is lower than normal combustion, as low concentration biogas (main component CH
4) and low concentration coal mine gas (main component CH
4) burning, not only saved resource but also reduced the destruction that discharge of methane causes atmospheric environment.
Another characteristics of combustion gas catalytic combustion are full premix, the burning of nonflame plane, when air with after combustion gas mixes by a certain percentage, temperature by catalyst-supporting support is during greater than the light-off temperature of catalyst, catalyst combustion reaction could take place, and the maximum temperature of catalytic combustion must be controlled at below the catalysqt deactivation limiting temperature, otherwise catalyst can cause inactivation by Yin Gaowen.Therefore, previous catalytic burner, as the disclosed application for a patent for invention specification of Patent Office of the People's Republic of China " catalytic combustion system; publication number: CN1173919A ", " system for catalytic combustion; publication number: CN1695002A " and " gas fuel catalytic combustor; publication number: CN1828137A " preheat burner is arranged all, be used for the preheating of catalyst carrier.On the other hand, the velocity flow profile of full premixed gas by catalyst carrier must be evenly, otherwise it is too high local temperature to occur, causes local catalysqt deactivation and make whole catalytic burner cisco unity malfunction.Because catalyst is subjected to the condition restriction of high temperature limit temperature, the unit are combustion intensity of the catalyst carrier of catalytic burner can not be excessive, increase combustion power and can only increase burning area, but the increase of catalyst carrier burning area, must bring the difficulty of the even preheating of catalyst carrier, make and be difficult to industrial applications by the complex structure of high-power catalytic burner and bulky.
(3), summary of the invention
The purpose of this invention is to provide a kind of high power gas catalytic burner, the preheated burning device of cancellation conventional catalyst burner solves directly igniting on the catalyst-supporting support module, preheating catalyst carrier module, carries out the transition to the technical problem of catalytic combustion gradually again; Solve the flow velocity even distribution problem of fluid by the catalyst carrier module; Simplify simultaneously gas catalytic burner structure, realize that volume minimizes under the certain condition of combustion power, reduce the burner cost, be convenient to industrial applications.
To achieve these goals, the present invention proposes following technical scheme:
This high power gas catalytic burner, comprise that one is communicated with the burner abdominal cavity of gas pipeline, it is characterized in that: the inlet end 16 of gas pipeline is connected with an end of branch pipe tee connection 7, the other two ends of branch pipe tee connection 7 are 90 degree elbow shapes respectively, and be connected with the mixed-gas channel 9 that is centered around periphery, catalytic burner abdominal cavity, at mixed-gas channel 9 entrance and exits fluid rectifier 3 and 8 are set respectively, respectively connect one group of catalyst carrier module 2 that places in the framework burner abdominal cavity 10 two-sided, in the gap around each catalyst carrier porous module, all fill high-temperature-resistant thermal-insulation material 4, have a temperature sensor inlet 6 on burner abdominal cavity shell 1, temperature sensor 5 stretches in the hole or pore channel of catalyst carrier module 2 from said temperature sensor inlet 6.
Said catalyst carrier porous module 2 is resistant to elevated temperatures rectangle porous honeycomb ceramic bodies, or rectangle porous crack foamed ceramic body, or high temperature resistant and oxidation resistant metal porous honeycomb ceramics, or the rectangle combustion front that is made of the metallic fiber cloth material.
At least more than one noble metal catalysts and rare earth material co-catalyst in load platinum (Pt), palladium (Pd) or the rhodium (Rh) on the hole of said catalyst carrier module 2 or the hole all surface.
Above-mentioned fluid rectifier has twice, and the first road fluid rectifier 3 is positioned at branch pipe tee connection 7 and mixed-gas channel 9 joints, and the second road fluid rectifier 8 is positioned at mixed-gas channel 9 and burner abdominal cavity 10 boundarys.
The above-mentioned first fluid rectifier 3 and second fluid rectifier 8 are made of straight hole ceramic honey comb sheet or aperture metallic plate.
Said burner abdominal cavity shell 1 two-sided all has a circle groove 17, and the lower limb of the framework 18 of supporting catalytic agent carrier multiple-hole die piece embeds in the above-mentioned groove 17, is filled with the high-temperature-resistant thermal-insulation material in the groove, is connected by bolt between framework 18 and the catalytic burner shell 1.
Above-mentioned high power gas catalytic burner can be that above parallel connections of single group or two groups or non-parallel connection combine.
The heating surface of the combustion front of said catalyst carrier 2 and heat exchanger 11 is parallel to each other, and is arranged vertically, and its parallel distance is less than 10cm.
Above-mentioned heat exchanger 11 can be shell and tube or finned or board-like or heat-pipe heat exchanger.
Between above-mentioned heat exchanger and the heat exchanger for being connected in series.
The operation principle of the present invention and the course of work: the combustion gas catalytic combustion is the poor fuel flameless combustion of full premix, combustion gas before entering catalytic burner with the even premix of air, premixed gas carries out rectification after entering catalytic burner, and it is even to make mist pass through the velocity flow profile of catalyst carrier.Before the catalytic combustion, combustion gas mixing concentration is higher, can directly on catalyst-supporting support, light a fire, carry out ordinary combustion, the preheating catalyst carrier module is when the temperature of catalyst-supporting support module during greater than the light-off temperature of catalyst, the gas concentration of premixed gas is reduced to lower poor fuel concentration gradually carries out catalytic combustion, keep poor fuel gas concentration,, and ignition temperature is controlled at below the catalyst limiting temperature by control premixed gas flow-control catalytic combustion temperature.
The concrete course of work is as follows: will be and the mixed uniformly gas inlet pipe of air road threeway 7, full premixed gas evenly is divided into two strands by branch pipe tee connection 7, after 3 rectifications of the first road fluid rectifier, enter catalytic burner mixed-gas channel 9, again by entering catalytic burner abdominal cavity 10 after 8 rectifications of the second road fluid rectifier, passage or hole by the catalyst carrier module 2 of two sides, catalytic burner abdominal cavity symmetry flow out, when catalyst carrier module temperature reaches the light-off temperature of catalyst, catalyst combustion reaction takes place in premixed gas in catalyst-supporting support passage or hole, realize two-sided catalytic combustion, and discharge heat energy, reach the discharging that reduces flue gas pollutant simultaneously.In order to allow catalyst carrier module 2 reach light-off temperature, the present invention is combustion preheater on the catalyst-supporting support module directly, before the igniting, the gas concentration of control premixed gas is slightly larger than the explosion limit upper limit of combustion gas, when flowing out, the catalyst carrier module channels of premixed gas 10 two sides symmetries from the catalytic burner abdominal cavity or hole light by igniter, after lighting a fire successfully, fully pre-mixing gas combustion concentration is reduced to gradually is slightly less than theoretically complete combustion concentration, keep this combustion gas mixing concentration, catalytic burner enters the ordinary combustion preheating catalyst carrier stage, the temperature ecto-entad of catalytic carrier module transmits, and raise gradually, when the detected temperatures of temperature sensor 5 reaches the light-off temperature of catalyst, fully pre-mixing gas combustion concentration is reduced to the optium concentration (being slightly less than the lower explosive limit of combustion gas) of catalytic combustion gradually by being slightly less than theoretically complete combustion concentration gradually, catalytic burner enters the catalytic combustion stage, keep combustion gas catalytic combustion optium concentration, the flow that only need regulate premixed gas can be controlled the temperature of catalytic combustion, reaches the purpose of low pollution emission simultaneously.
The present invention has overcome the drawback of conventional catalyst burner, compares with the noncatalytic combustion technology with the conventional catalyst burner to have following characteristics and beneficial effect:
1, the present invention adopts new catalytic combustion technology, cancelled the preheated burning device of existing gas catalytic burner, direct combustion preheater on the catalyst-supporting support module, preheat temperature is even, simplified the structure of high power gas catalytic burner, the catalytic burner volume is reduced, and cost reduces.
2, the present invention has optimized the structure of gas catalytic burner, on catalytic burner, adopt two-sided catalyst carrier module symmetrical structure arrangement form, realized a two-sided catalytic combustion of burner, under identical combustion power condition, catalytic burner adopts the volume of symmetrical two-sided ratio of combustion single face burning can reduce about 40%, compact conformation, cost reduces, and especially is fit to high-power catalytic burner.
3, compare with noncatalytic combustion, the present invention can be lower than catalytic combustion under the extreme poverty fuel condition of gas explosion concentration limit, and efficiency of combustion reduces the discharging of Air thing simultaneously greater than 99.99%, and flue gas pollutant NOx, CO, HC are all less than 10 * 10
-6
4, catalytic combustion of the present invention is based on radiant heat transfer, the heat transfer efficiency height, and combustion noise is low, tempering phenomenon can not take place.
5, the present invention can be according to the needs of Actual combustion power and heat exchange form, with catalytic burner list group or many groups are in parallel or non-parallel modular is used in combination.
6, be connected by bolt between the framework of supporting catalytic agent carrier multiple-hole die piece and the catalytic burner shell, made things convenient for the dismounting maintenance.
The catalytic combustion of the suitable all gas fuel of the high-power catalytic burner of the present invention, its maximum combustion power determines that by the area of catalyst carrier module 2 the unit are combustion intensity is 25W/cm to the maximum
2About, the present invention need not the discharging that after-treatment can reach control Air thing when thermal source or power are provided.
(4), description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one;
Fig. 2 is the A-A cross-sectional view of the embodiment of the invention one;
Fig. 3 is the B-B cross-sectional view of the embodiment of the invention one.
Fig. 4 is the structural representation of the embodiment of the invention two.
1-burner abdominal cavity shell; 2-catalyst carrier module; 3-the first road fluid rectifier; 4-high-temperature-resistant thermal-insulation material; 5-temperature sensor; 6-temperature sensor inlet; 7-branch pipe tee connection; 8-the second road fluid rectifier; 9-mixed-gas channel; 10-burner abdominal cavity; 11-heat exchanger; 12-heat exchanger water inlet; 13-heat exchanger delivery port; 14-tube connector; 15-90 degree elbow, the inlet end of 16-gas pipeline, 17-groove, 18-framework, 19-bolt, 20-connecting plate.
(5), the specific embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail.
Embodiment one:
The structure of the high power gas catalytic burner among the embodiment one is as shown in Figure 1 to Figure 3: this high power gas catalytic burner, the inlet end 16 of gas pipeline is connected with an end of branch pipe tee connection 7, the other two ends of branch pipe tee connection 7 are the shape of 90 degree elbows 15 respectively, and be connected with the mixed-gas channel 9 that is centered around periphery, catalytic burner abdominal cavity, at mixed-gas channel 9 entrance and exits fluid rectifier is set respectively, the first road fluid rectifier 3 is positioned at branch pipe tee connection 7 and mixed-gas channel 9 joints, and the second road fluid rectifier 8 is positioned at mixed-gas channel 9 and burner abdominal cavity 10 boundarys.Respectively connect one group of catalyst carrier module 2 that places in the framework 18 burner abdominal cavity 10 two-sided, in the gap around each catalyst carrier module, all fill high-temperature-resistant thermal-insulation material 4, the two-sided of said burner abdominal cavity shell 1 all has one to enclose groove 17, the lower limb of the framework 18 of supporting catalytic agent carrier multiple-hole die piece embeds in the above-mentioned groove 17, be filled with the high-temperature-resistant thermal-insulation material in the groove, framework 18 all is welded with connecting plate 20 with catalytic burner shell 1, connect by bolt 19 between two connecting plates, to be easy to remove and repair.Can certainly weld between framework 18 and the catalytic burner shell 1.
Have a temperature sensor inlet 6 on burner abdominal cavity shell 1, temperature sensor 5 stretches in the catalyst carrier porous module 2 from said temperature sensor inlet 6.
Said burner abdominal cavity shell 1 housing is that stainless steel is made.
Above-mentioned branch pipe tee connection 7 and the pipeline that is connected with catalytic burner mixed-gas channel 9 can be stainless steel tube or other metal tube.
Said catalyst carrier module 2 is that thickness is that 30 millimeters, hole count are 400/ square inch high temperature resistant rectangle cyanines green stone honeycomb ceramic body, and platinum (Pt), palladium (Pd), at least a noble metal catalyst of rhodium (Rh) and ZrO in load on the honeycomb ceramic body
2, CeO
2, La
2O
3Etc. at least a rare earth material co-catalyst.
Above-mentioned insulation material 4 has the insulation fibre cotton (as aluminosilicate refractory fiber) of the above high temperature of anti-1300 degree, when being used to prevent to burn around the catalyst carrier porous module 2 mist leak and play insulation effect.
The above-mentioned first fluid rectifier 3 and second fluid rectifier 8 are made of straight hole ceramic honey comb sheet or aperture metallic plate.First fluid rectifier 3 places branch pipe tee connection 7 and mist pipeline 9 joints, is used to eliminate the secondary stream that mist forms by elbow; Second fluid rectifier 8 places mixed-gas channel 9 inboard and burner abdominal cavity 11 boundarys, is used for the mist in the mixed-gas channel is imported catalytic burner abdominal cavity 10 equably.
The bilateral symmetry of gas catalytic burner abdominal cavity 10 gas vents is arranged catalytic carrier module 2, can realize two-sided catalytic combustion.
Said temperature sensor 5 is diameter of phi=0.5mm, K type thermocouple, and temperature-measuring range-270～1372 ℃ is used to measure the feedback of ignition temperature and temperature signal.
The present invention is that fuel is made embodiment with the natural gas, and the course of work is as follows:
Input channel threeway 7 inlets behind air and the even premix of natural gas gas, before the igniting, control natural gas premix concentration about about 17%, full premixed gas evenly is divided into two strands by branch pipe tee connection 7, after 3 rectifications of the first road fluid rectifier, enter catalytic burner mixed-gas channel 9, again by entering catalytic burner abdominal cavity 10 after 8 rectifications of the second road fluid rectifier, combustion gas mixing gas is lighted by igniter when carrier for ceramic honeycomb catalyst module 2 honeycomb holes of two sides, burner abdominal cavity symmetry flow out, after lighting a fire successfully, increasing air mass flow is reduced to natural gas premix concentration about 10% gradually, keep this combustion gas mixing concentration, catalytic burner enters the ordinary combustion preheating catalyst carrier module stage, the temperature ecto-entad transmission of catalyst carrier module also raises gradually, after temperature sensor 5 detects the light-off temperature that temperature reaches catalyst, increase the premix air mass flow, gradually natural gas premix concentration is reduced to about 5% by 10%, premixed gas generation catalyst combustion reaction under the effect of catalyst, discharge heat energy, catalytic burner enters the flameless catalytic combustion stage, keep the premix concentration of natural gas about 5%, the flow that only need regulate premixed gas can be controlled the temperature or the power (flow of premixed gas is directly proportional with ignition temperature or power) of catalytic combustion, reaches the purpose of control smoke pollution discharging simultaneously.700 ℃～1300 ℃ of the catalytic combustion temperature controlling range of present embodiment, combustion power 60KW～150KW, stack gas emissions NOx, CO, HC are all less than 6 * 10
-6
The maximum combustion power that the present invention singly organizes catalytic burner is not limited to 150kw, can be according to actual needs, increase single group catalytic burner catalyst-supporting support module, can increase combustion power, the area of 1 square metre of catalyst carrier module of every increase can increase about combustion power 250KW, if single group catalytic burner combustion power can't satisfy instructions for use, can or be used in combination separately combustor parallel more than two groups, can reach the above combustion power of MW level.
Embodiment two:
Fig. 4 is the structural representation of two groups of non-applied in any combination embodiment in parallel of catalytic burner of the present invention, this is that two groups of high power gas catalytic burners of application and three groups of finned heat exchangers 11 carry out heat exchange, for preventing that the heat exchanger condensing drip from causing the catalyst actual effect on catalytic carrier module 2, catalytic burner is taked the vertical combustion form, two groups of gas catalytic burners and three groups of heat exchangers are provided with one to one at interval, the catalyst carrier burning radiation face of catalytic burner is parallel with the heat exchanger heating surface, its parallel distance 4cm helps the radiation heat transfer between catalytic combustion and the heat exchanger.Be connected in series by tube connector 14 between the heat exchanger.
The above-mentioned specific embodiment and embodiment just can not limit the present invention to of the present invention further specifying, claim in claims has been pointed out scope of the present invention, therefore suitable with claims of the present invention implication and any change in the scope all should be thought to be included in the scope of claims of the present invention.
Claims (7)
- [claim 1] a kind of high power gas catalytic burner, comprise that one is communicated with the burner abdominal cavity of gas pipeline, it is characterized in that: the inlet end of gas pipeline (16) is connected with an end of branch pipe tee connection (7), the other two ends of branch pipe tee connection (7) are 90 degree elbow shapes respectively, and be connected with the mixed-gas channel that is centered around periphery, catalytic burner abdominal cavity (9), at mixed-gas channel (9) entrance and exit fluid rectifier (3 is set respectively, 8), respectively connect one group of catalyst carrier module (2) that places in the framework burner abdominal cavity (10) two-sided, in the gap around each catalyst carrier module, all fill high-temperature-resistant thermal-insulation material (4), have a temperature sensor inlet (6) on burner abdominal cavity shell (1), temperature sensor (5) stretches in the hole or pore channel of catalyst carrier module (2) from said temperature sensor inlet (6).
- [claim 2] high power gas catalytic burner according to claim 1, it is characterized in that: said catalyst carrier module (2) is resistant to elevated temperatures rectangle honeycomb ceramic body, or rectangle foamed ceramic body, or high temperature resistant and oxidation resistant metallic honeycomb bodies, or the rectangle combustion front that constitutes by the metallic fiber cloth material.
- [claim 3] high power gas catalytic burner according to claim 1 is characterized in that: more than one noble metal catalysts and rare earth material co-catalyst in load platinum (Pt), palladium (Pd) or the rhodium (Rh) at least on the hole of said catalyst carrier module (2) or the hole all surface.
- [claim 4] high power gas catalytic burner according to claim 1, it is characterized in that: above-mentioned fluid rectifier has twice, the first road fluid rectifier (3) is positioned at branch pipe tee connection (7) and mixed-gas channel (9) joint, and the second road fluid rectifier (8) is positioned at mixed-gas channel (9) and burner abdominal cavity (10) boundary.
- [claim 5] high power gas catalytic burner according to claim 4 is characterized in that: the above-mentioned first road fluid rectifier (3) and the second road fluid rectifier (8) are made of straight hole ceramic honey comb sheet or aperture metallic plate.
- [claim 6] high power gas catalytic burner according to claim 1, it is characterized in that: the two-sided of said burner abdominal cavity shell (1) all has one to enclose groove (17), the lower limb of the framework (18) of supporting catalytic agent carrier multiple-hole die piece embeds in the above-mentioned groove (17), be filled with the high-temperature-resistant thermal-insulation material in the groove, be connected by bolt between framework (18) and the catalytic burner shell (1).
- [claim 7] is characterized in that according to any described high power gas catalytic burner of claim 1-6: above-mentioned high power gas catalytic burner is that above parallel connections of single group or two groups or non-parallel connection combine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102006958A CN100498061C (en) | 2007-05-24 | 2007-05-24 | High power gas catalytic burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007102006958A CN100498061C (en) | 2007-05-24 | 2007-05-24 | High power gas catalytic burner |
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| Publication Number | Publication Date |
|---|---|
| CN101050856A CN101050856A (en) | 2007-10-10 |
| CN100498061C true CN100498061C (en) | 2009-06-10 |
Family
ID=38782396
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007102006958A Expired - Fee Related CN100498061C (en) | 2007-05-24 | 2007-05-24 | High power gas catalytic burner |
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| CN (1) | CN100498061C (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101929676B (en) * | 2010-08-05 | 2012-07-25 | 西安交通大学 | Catalytic porous medium burner |
| CN103512053A (en) * | 2013-07-17 | 2014-01-15 | 杨雪燕 | Novel energy-saving stove |
| CN103470581B (en) * | 2013-09-13 | 2015-12-02 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | A kind of radial gas rectifier |
| CN103727527A (en) * | 2014-01-02 | 2014-04-16 | 北京建筑大学 | High-power practical gas catalytic combustion kiln |
| PT3303921T (en) * | 2015-06-04 | 2019-09-06 | Polidoro S P A | Plate gas burner for boiler |
| CN105841146A (en) * | 2016-01-26 | 2016-08-10 | 北京建筑大学 | Nearly zero pollutant discharge flameless catalytic combustion condensing boiler |
| CN105757664B (en) * | 2016-03-29 | 2019-04-26 | 芜湖美的厨卫电器制造有限公司 | Burner, gas heater and the method for heating water |
| CN105841150B (en) * | 2016-03-29 | 2019-03-12 | 芜湖美的厨卫电器制造有限公司 | Burner, gas heater and the method for heating water |
| KR101688894B1 (en) * | 2016-08-08 | 2016-12-23 | 주식회사 지엔티엔에스 | Using high temperature catalytic combustion burners |
-
2007
- 2007-05-24 CN CNB2007102006958A patent/CN100498061C/en not_active Expired - Fee Related
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| CN101050856A (en) | 2007-10-10 |
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Effective date of registration: 20110927 Address after: 100044, No. 1, Xicheng District exhibition hall, Beijing, Beijing Co-patentee after: HENAN ROAD&BRIDGE CONSTRUCTION GROUP CO., LTD. Patentee after: Beijing Engineering and Architecture School Address before: 100044, No. 1, Xicheng District exhibition hall, Beijing, Beijing Patentee before: Beijing Engineering and Architecture School |
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